At one time Iwas grinding my own flour. Whole grain keeps longer. Whole wheat flour ground at home spoils quickly.I kept my wheat in food grade plastic buckets. Fill with wheat, stick a Co2 hose in the bottom, and purge the air. Snap on the lid.Argon would work to, but is more expensive.

Best,MikeTractors are made to work!"A Cub will do as much as a team of horses,.. More in hot weather!" - C. W. Spradlin 1909-1994